64003207040 has 64 divisors (see below), whose sum is σ = 155894686560. Its totient is φ = 25118226432.

The previous prime is 64003207039. The next prime is 64003207043. The reversal of 64003207040 is 4070230046.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (64).

It is a super-2 number, since 2×64003207040² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64003207043) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 909524 + ... + 977363.

Almost surely, 2^64003207040 is an apocalyptic number.

It is an amenable number.

64003207040 is an abundant number, since it is smaller than the sum of its proper divisors (91891479520).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

64003207040 is a wasteful number, since it uses less digits than its factorization.

64003207040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1886959 (or 1886947 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 26.

Adding to 64003207040 its reverse (4070230046), we get a palindrome (68073437086).

The spelling of 64003207040 in words is "sixty-four billion, three million, two hundred seven thousand, forty".